A simple existential observation that has the same meaning as "Whaddya gonna do?" or "Shit Happens". Taken from the upcoming Samuel L. Jackson movie of the same name, and immortilised by screenwriter Josh Friedman on his blog post of Wednesday, August 17, 2005.

a sort of philosophy. Somnewhere in between "Cest la vie", "Whattya gonna do?" and "Shit happens"

WIFE: "Honey you stepped in dog poop again. "
ME: "Snakes on a Plane..."
DOCTOR: "Your cholesterol is 290. Perhaps you want to mix in a walk once in a while."
ME: "Snakes on a Plane..."
WIFE: "Honey while you were on your cholesterol walk you stepped in dog poop again."
ME: "Snakes on a Plane..."

an internet meme, originating with the 2006 film "Snakes on a Plane" starring Samuel L. Jackson.

1. something completely ridiculous 2.an expression signaling frustration and disbelief, often in response to an absurd event or statement. to add emphasis, interject vulgarities in the phrase, such as "snakes on a motherfucking plane"

The beauty of an early reveal. This definition builds on the second big idea in Josh Friedman's famous blog post: Friedman loved the movie title because it didn't hide what the movie was all about. SoaP happens whenever you give away the big secret, the grand idea, early on. SoaP happens when you just tell it like it is.

Executive Producer A: I was thinking of calling the show 'The Rockford Files.'

Executive Producer B: But wouldn't it be about a bijillion times better if we called it 'Drunk, middle-aged PI living in a trailer on the beach?' That would be totally Snakes on a Plane!